Oil & Gas
| Tue 16 Dec 2025
Beijing, Dec. 16 -- Daqing Oilfield and PetroChina have sought patent for Beam-pumping Unit Balance Adjusting Method and Balance Testing Device. This invention was developed by Sun Chunlong, Qi Xing, Sun Yan'an, Zhang Deshi, Hou Yu, Zhang Kaibo, Wang Yang, Wang Cui, Zhou Lufang, Li Chunhong, Wei Feng and Zhou Guangling.
The p..